The Sun's center may be coincident with both...

Question 1 / 2707066636ee928f7522a1c51a207

Question 1 of 2707066636ee928f7522a1c51a207

The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.

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Question 1 of 27070

The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.

🔍 Key Concepts

• Celestial equator and what declination the Sun has when it lies on it • Meaning of the prime vertical (the great circle passing through the East and West points of the horizon and the zenith) • Relationship between the Sun’s declination and its apparent path relative to the equator and solstices

💭 Think About

• Under what condition does any celestial body lie exactly on the celestial equator in terms of declination? • When a body is on the prime vertical, what is special about its azimuth and its hour angle relative to the observer’s meridian? • Compare what happens to the Sun’s declination at the equinoxes versus at the June and December solstices.

✅ Before You Answer

• Make sure you know that declination = 0° corresponds to the celestial equator • Confirm that the June and December solstitial points correspond to the maximum north/south declinations, not zero • Verify whether being in upper transit (on the observer’s meridian) can ever place the Sun on the prime vertical at the same time for a normal observer position.

Question 1 of 27070

The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.

it crosses the June solstitial point

it is in upper transit

it crosses the December solstitial point

its declination is zero

Question 1 / 2707066636ee928f7522a1c51a207

Question 1 of 2707066636ee928f7522a1c51a207

The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.

Back

Question 1 of 27070

The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.